Replacement of the O-ring of the Oil Cap Assembly [CFMB]

TASK 79-11-10-300-004-A
Replacement of the O-ring of the Oil Cap Assembly

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CONTAINER - CLEAN, APPLICABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )
No specific	Torque wrench: range to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
80	O-RING	AIPC 79-11-10-01-173
60	O-RING	AIPC 79-11-10-01-175

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-002-A	Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector)
TASK 12-13-79-610-002-A-01	Check oil level and replenish (Pressure Filling)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
Replacement of the Damaged O-ring on the Oil Cap Assembly (PRE CFM SB 79-0011)
Replacement of the Damaged O-ring on the Oil Cap Assembly (POST CFM SB 79-0011)

3. Job Set-up
Subtask 79-11-10-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 79-11-10-010-057-A ** ON A/C NOT FOR ALL

B. Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 79-11-10-020-054-A ** ON A/C NOT FOR ALL

A. Removal of the damaged O-ring from the oil cap assembly

PRE CFM SB 79-0011

(1) Removal of the damaged O-ring from the oil cap assembly
(a) Put the filler cap handle (70) to the vertical (unlocked) position (Ref. AMM TASK 12-13-79-610-002).
(b) Remove the 4 bolts (10) and washers (20).
(c) Keep the plate (30).
(d) Remove the oil cap assembly (40) from scupper (50).
(e) Put the oil cap assembly (40) in a CONTAINER - CLEAN, APPLICABLE to collect oil drippings.
(f) Remove the O-ring (60) from the groove of the oil cap assembly (40). Discard the O-ring (60).

END OF PRE CFM SB 79-0011

POST CFM SB 79-0011

(2) Removal of the damaged O-rings from the oil cap assembly
(a) Put the oil tank filler cap handle (70) to the vertical (unlocked) position (Ref. AMM TASK 12-13-79-610-002).
(b) Remove the 2 bolts (10) and washers (20).
(c) Remove the oil cap assembly (40) from scupper (50).
(d) Put the oil cap assembly (40) in a CONTAINER - CLEAN, APPLICABLE to collect oil drippings.
(e) Remove and discard the O-ring (60) from the groove of the oil cap assembly (40).
(f) Open up the flapper of the oil cap assembly (40). Remove and discard the O-ring (80) from the groove.

END OF POST CFM SB 79-0011

Subtask 79-11-10-420-054-A ** ON A/C NOT FOR ALL

B. Installation of the new O-ring on the oil cap assembly

PRE CFM SB 79-0011

(1) Installation of the new AIPC 79-11-10-01-175 O-RING (60) on the oil cap assembly

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(a) Lubricate a new O-ring (60) with engine oil (Material No.CP2442) .
(b) Install the new O-ring (60) in the groove of the oil cap assembly (40).
(c) Make sure that the surfaces are clean before you install the parts.
(d) Install the oil cap assembly (40) on the scupper (50). Make sure that you do not damage the O-ring (60).
(e) Make sure that the oil cap assembly (40) and the scupper (50) are installed in the correct direction.
(f) Lubricate the threads of bolts (10) with graphite grease (Material No.CP2101)
(g) Install the four bolts (10) and washers (20) to attach the plate (30), the oil cap assembly (40) and the scupper (50) to the oil tank.
(h) TORQUE the bolts (10) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

.
(i) Install and lock the filler cap handle (70) (Ref. AMM TASK 12-13-79-610-002).

END OF PRE CFM SB 79-0011

POST CFM SB 79-0011

(2) Installation of the new AIPC 79-11-10-01-175 O-RING (60) and AIPC 79-11-10-01-173 O-RING (80) on the oil cap assembly

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(a) Lubricate the new O-rings (60) and (80) with engine oil (Material No.CP2442) .
(b) Install the new O-ring (60) in the groove of the oil cap assembly (40).
(c) Open the flapper of the oil cap assembly (40). Install the new O-ring (80) in the groove.
(d) Make sure that the surfaces are clean before you install the parts.
(e) Install the oil cap assembly (40) on the scupper (50). Make sure that you do not damage the O-ring (60).
(f) Make sure that the oil cap assembly (40) is correctly installed.
(g) Lubricate the threads of bolts (10) with graphite grease (Material No.CP2101)
(h) Install the two bolts (10) and washers (20) to attach oil cap assembly (40) to the oil tank.
(i) TORQUE the bolts (10) to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )

.
(j) Install and lock the filler cap handle (70) (Ref. AMM TASK 12-13-79-610-002).

END OF POST CFM SB 79-0011

5. Close-up
Subtask 79-11-10-410-056-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:39:05 UTC